What, is he scared of someone finding old reruns of The Critic?

Edit: Though the points he's making are right and valid; though how to tell the difference between pushing the envelope and just plain "mean" - I guess Don Rickles would never get anywhere if he started out today.

"Watch out for self-censorship. I don't mean use all the swears, just that if you find you're stopping yourself from saying something, ask yourself why." - A teacher, paraphrased.